libde265: SAO sequential filter heap buffer overflow via signed integer overflow

Description

libde265 is an open source implementation of the h.265 video codec. Versions prior to 1.1.1 use signed 32-bit arithmetic to calculate the sample adaptive offset input-buffer size, allowing a crafted HEVC stream with large dimensions and 16-bit luma samples to cause an integer overflow, an undersized allocation, and an out-of-bounds heap read that may expose heap data in decoded output or crash the decoder. Version 1.1.1 contains a patch.

Scores

EPSS (exploitation in 30 days)

0.39% · top 66% of all CVEs (7 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.4.

Weakness

• CWE-122: Heap-based Buffer Overflow (opens in a new tab)All about CWE-122 and its CVEs
• CWE-190: Integer Overflow or Wraparound (opens in a new tab)All about CWE-190 and its CVEs

Affected products

• strukturag · libde265

  • affected < 1.1.1

References (1)

• https://github.com/strukturag/libde265/security/advisories/GHSA-j2qq-x2xq-g9wr (opens in a new tab)x_refsource_CONFIRM

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2026-54241](https://trackcve.app/badge/CVE-2026-54241.svg)](https://trackcve.app/cve/CVE-2026-54241)

Record last updated 14 Sept 2026, 16:15 UTC.